{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T05:25:39Z","timestamp":1790832339915,"version":"4.1.0"},"reference-count":28,"publisher":"IOP Publishing","issue":"6","license":[{"start":{"date-parts":[[2018,6,25]],"date-time":"2018-06-25T00:00:00Z","timestamp":1529884800000},"content-version":"vor","delay-in-days":24,"URL":"https:\/\/publishingsupport.iopscience.iop.org\/iop-standard\/v1"},{"start":{"date-parts":[[2018,6,25]],"date-time":"2018-06-25T00:00:00Z","timestamp":1529884800000},"content-version":"tdm","delay-in-days":24,"URL":"https:\/\/iopscience.iop.org\/info\/page\/text-and-data-mining"}],"funder":[{"name":"Far-Eastern Branch of Russian Academy of Sciences","award":["AAAA-A17-117030110041-5"],"award-info":[{"award-number":["AAAA-A17-117030110041-5"]}]},{"name":"FASIE","award":["11205\u0413\u0423\/2016"],"award-info":[{"award-number":["11205\u0413\u0423\/2016"]}]}],"content-domain":{"domain":["iopscience.iop.org"],"crossmark-restriction":false},"short-container-title":["Physiol. Meas."],"published-print":{"date-parts":[[2018,6,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    <jats:italic>Objective<\/jats:italic>\n                    : The time signature of tracheal noise in the 200\u20132000 Hz frequency band recorded during a forced expiratory manoeuvre (FET\n                    <jats:sub>a<\/jats:sub>\n                    ) is a promising tool for diagnosis of bronchial obstructions. FET\n                    <jats:sub>a<\/jats:sub>\n                    is typically registered using a microphone with a stethoscope head placed on the neck over the trachea (stethoscope sensor). We studied basic time and spectral parameters of forced expiratory tracheal noises with a microphone placed near the mouth (lapel microphone, outside the flow of exhaled air) and compared these with measurements via stethoscope sensor, with the aim of providing patient home monitoring via standard personal computer facilities.\n                    <jats:italic>Approach<\/jats:italic>\n                    : FET\n                    <jats:sub>a,<\/jats:sub>\n                    200 Hz band pass times, and frequency responses of signals recorded simultaneously with both sensors were analysed in a sample of 24 healthy volunteers.\n                    <jats:italic>Main results<\/jats:italic>\n                    : Averaged real transfer function of signals from a stethoscope sensor and a lapel microphone in the frequency range 200\u20131800 Hz was characterized by a slope of\u2009\u2009\u22127.2 dB\/octave. This is near the slope of\u2009\u2009\u22126 dB\/octave predicted via theoretical models of both sensors. The lapel microphone and stethoscope sensor were not interchangeable regarding spectral characteristics of forced expiratory tracheal noises. However, FET\n                    <jats:sub>a<\/jats:sub>\n                    measurements in healthy volunteers via stethoscope sensor and lapel microphone showed no significant differences according to U-Mann\u2013Whitney test for independent samples.\n                    <jats:italic>Significance<\/jats:italic>\n                    : The ability to measure FET\n                    <jats:sub>a<\/jats:sub>\n                    successfully with a lapel microphone placed near the mouth was experimentally demonstrated in healthy volunteers. Additional studies are needed to verify whether FET\n                    <jats:sub>a<\/jats:sub>\n                    measured near the mouth is acceptable for monitoring pulmonary status in patients with asthma or chronic obstructive pulmonary disease.\n                  <\/jats:p>","DOI":"10.1088\/1361-6579\/aac556","type":"journal-article","created":{"date-parts":[[2018,5,16]],"date-time":"2018-05-16T11:45:16Z","timestamp":1526471116000},"page":"065006","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":4,"title":["Measurement and estimation of human forced expiratory noise parameters using a microphone with a stethoscope head and a lapel microphone"],"prefix":"10.1088","volume":"39","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7092-2383","authenticated-orcid":false,"given":"A Y","family":"Glazova","sequence":"first","affiliation":[{"name":"Saint Petersburg Electrotechnical University \u2018LETI\u2019"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7270-2341","authenticated-orcid":false,"given":"V I","family":"Korenbaum","sequence":"additional","affiliation":[{"name":"V.I. Il\u2019ichev Pacific Oceanological Institute"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A E","family":"Kostiv","sequence":"additional","affiliation":[{"name":"V.I. Il\u2019ichev Pacific Oceanological Institute"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"O I","family":"Kabancova","sequence":"additional","affiliation":[{"name":"V.I. Il\u2019ichev Pacific Oceanological Institute"},{"name":"Far Eastern Federal University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A A","family":"Tagiltcev","sequence":"additional","affiliation":[{"name":"V.I. Il\u2019ichev Pacific Oceanological Institute"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S N","family":"Shin","sequence":"additional","affiliation":[{"name":"V.I. 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All rights, including for text and data mining, AI training, and similar technologies, are reserved.","name":"copyright_information","label":"Copyright Information"},{"value":"2018-01-23","name":"date_received","label":"Date Received","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2018-05-16","name":"date_accepted","label":"Date Accepted","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2018-06-25","name":"date_epub","label":"Online publication date","group":{"name":"publication_dates","label":"Publication dates"}}]}}